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/*
* Copyright (c) 2004-2009 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2010-2011 IBM Corporation. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "orte_config.h"
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include "opal/util/argv.h"
#include "opal/util/output.h"
#include "orte/mca/errmgr/errmgr.h"
#include "orte/runtime/orte_globals.h"
#include "orte/constants.h"
#include "orte/mca/ras/base/ras_private.h"
#include "ras_loadleveler.h"
/*
* Local functions
*/
static int orte_ras_loadleveler_allocate(opal_list_t *nodes);
static int orte_ras_loadleveler_finalize(void);
static int orte_ras_loadleveler_discover(opal_list_t *nodelist);
static int ll_getline(FILE *fp, char *input);
#define LL_FILE_MAX_LINE_LENGTH 512
/*
* Global variable
*/
orte_ras_base_module_t orte_ras_loadleveler_module = {
orte_ras_loadleveler_allocate,
orte_ras_loadleveler_finalize
};
/*
* Discover available (pre-allocated) nodes. Allocate the
* requested number of nodes/process slots to the job.
*/
static int orte_ras_loadleveler_allocate(opal_list_t *nodes)
{
int ret = ORTE_SUCCESS;
if (ORTE_SUCCESS != (ret = orte_ras_loadleveler_discover(nodes))) {
ORTE_ERROR_LOG(ret);
return ret;
}
/* If we didn't find anything, then this
* is an unrecoverable error - report it
*/
if (opal_list_is_empty(nodes)) {
opal_output(orte_ras_base.ras_output,
"ras:loadleveler:allocate: No nodes were found in the LOADL_HOSTFILE - %s",
getenv("LOADL_HOSTFILE"));
return ORTE_ERR_NOT_FOUND;
}
return ret;
}
/*
* There's really nothing to do here
*/
static int orte_ras_loadleveler_finalize(void)
{
OPAL_OUTPUT_VERBOSE((1, orte_ras_base.ras_output,
"ras:loadleveler:finalize: success (nothing to do)"));
return ORTE_SUCCESS;
}
/**
* Discover the available resources. Obtain directly from LoadLeveler (and
* therefore have no need to validate) -- ignore hostfile or any other
* user-specified parameters.
*/
static int orte_ras_loadleveler_discover(opal_list_t* nodelist)
{
orte_node_t *node;
opal_list_item_t* item;
FILE *fp;
char *hostname;
char *filename;
char input[LL_FILE_MAX_LINE_LENGTH];
/* Ignore anything that the user already specified -- we're
getting nodes only from LoadLeveler. */
filename = getenv("LOADL_HOSTFILE");
if(NULL == filename) {
opal_output(orte_ras_base.ras_output,
"ras:loadleveler:allocate:discover: LOADL_HOSTFILE not set. "
"Unable to discover allocated nodes.");
return ORTE_ERROR;
}
fp = fopen(filename, "r");
if (NULL == fp) {
ORTE_ERROR_LOG(ORTE_ERR_FILE_OPEN_FAILURE);
return ORTE_ERR_FILE_OPEN_FAILURE;
}
/* Iterate through all the nodes and make an entry for each */
while (0 != ll_getline(fp, input)) {
hostname = strdup(input);
OPAL_OUTPUT_VERBOSE((1, orte_ras_base.ras_output,
"%s ras:loadleveler:allocate:discover: got hostname %s",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), hostname));
/* Remember that LoadLeveler may list the same node more than once.
So we have to check for duplicates. */
for (item = opal_list_get_first(nodelist);
opal_list_get_end(nodelist) != item;
item = opal_list_get_next(item)) {
node = (orte_node_t*) item;
if (0 == strcmp(node->name, hostname)) {
++node->slots;
OPAL_OUTPUT_VERBOSE((1, orte_ras_base.ras_output,
"%s ras:loadleveler:allocate:discover: found -- bumped slots to %d",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), node->slots));
break;
}
}
/* Did we find it? */
if (opal_list_get_end(nodelist) == item) {
/* Nope -- didn't find it, so add a new item to the list */
OPAL_OUTPUT_VERBOSE((1, orte_ras_base.ras_output,
"%s ras:loadleveler:allocate:discover: not found -- added to list",
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME)));
node = OBJ_NEW(orte_node_t);
node->name = hostname;
node->state = ORTE_NODE_STATE_UP;
node->slots_inuse = 0;
node->slots_max = 0;
node->slots = 1;
opal_list_append(nodelist, &node->super);
} else {
/* Yes, so we need to free the hostname that came back */
free(hostname);
}
}
fclose(fp);
return ORTE_SUCCESS;
}
static int ll_getline(FILE *fp, char *input)
{
char *ret;
ret = fgets(input, LL_FILE_MAX_LINE_LENGTH, fp);
if (NULL != ret) {
input[strlen(input)-1] = '\0'; /* remove newline */
return 1;
}
return 0;
}
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